A Windows based Spectral Analysis/Receiver Program primarily used
with the SDR-IQ, SDR-14 , SDR-IP, NetSDR, RF capturing hardware(http://www.rfspace.com) but can also be used
to analyze soundcard and wave file inputs.

Here is a capture of the AO40 passband showing an
unusual interfering signal tuning across the middle beacon. The
discretesteps would indicate a synthesized source. Also the signal
gets modulated by the beacon when it is close to it. This was captured by
AA4RC's station. This 3:40 minute file(~40MBytes!) can be downloaded from
http://www.rfspace.com/noise.zip and
played back using the SpectraVue demo version.

The following is an experimental version that
couples SpectraVue's soundcard output into the DRM(Digital Radio
Mondiale http://www.drm.org
) Receiver software "Dream". The DRM signal is a 10KHz wide digitally
modulated that has a very rectangular shape as seen in the spectral view.
Compare it to the normal AM shortwave signal to the right of it in the
spectrum. Here is a recording of the audio as received from a DRM station
in Canada. drmaudio.zip (~900K wave
file) Note this is not a good example of the audio quality since it is
recorded at only 8KHz.